Hello,
Thank you very much for choosing our theme and for contacting us.
Yes, you can save the template on any page and insert in your page and just replace the content. You can save a row or sections as a template as well.
Your screen shows the page title. This is the large page title you can set large titles globally in the Theme settings > Page title. Or you can set it for a certain page in the page settings: https://xtemos.com/docs/basel/options-for-pages-2/
In addition, the Header above the content is set in the Theme Settings > Header > Header layout.
Best Regards